A C O U S T I C
E N G I N E E R S
P
1
12
P1 & P2
P o w e r A m p l i f i e r s
3 . 1 D e s c r i p t i o n
The P1 and P2 are high quality power
amplifiers designed to partner ATC passive
monitors and other loudspeaker systems. The
amplifiers incorporate the same gain reduction and
loudspeaker protection circuits as used in the
ATC active monitors. This ensures that even
when working at very high levels the amplifier is
held back from clipping, so improving the
subjective performance and protecting the
loudspeakers from damage.
Both the P1 and P2 are of a "true" Dual Mono
design, in that the power supplies signal and return
paths are totally separated from each other. This
approach ensures that the Amplifier will
achieve the maximum signal separation and
minimum crosstalk. Further, intermodulation
between channels via the power supplies is
reduced to an absolute minimum at all
frequencies, and, the power delivery from one
channel cannot affect the specified power available
from the other channel.
Diagram 1 - PI rear panel and connection sockets
Diagram 2 - PI front panel
The amplifier mains power is turned on by a
switch on the rear panel. There is a
Green L.E.D. on the front panel to indicate that the mains supply is
connected, together with a Red L.E.D. to indicate that the
Amplifier is in Standby.
The Amplifier can be brought out of Standby by the Standby button on the
ATC
remote control (supplied with P1 and P2). On the rear panel is a push
button to d
efeat remote control operation in which case, when the
Amplifier is switched on the unit will not be in Standby, The Red L.E.D. will be
off, and the
remot
e control has no effect.
3 . 2 I n p u t s
Single ended Inputs via RCA phono sockets, and Differential (balanced) Inputs via
XLR sockets are provided. Each channel has two phono Input sockets, the ”Link”
Input phono sockets may be used to connect the Amplifier Inputs to a further ATC
Power Amplifier for Instance as a Sub Channel.
3 . 3 O u t p u t s
Loudspeaker connections are made using the two pairs of proprietary ATC
loudspeaker terminals. The left and right channels are clearly marked and
correspond to the left and right inputs. The positive terminal is marked red and the
negative terminal is marked black.
right
output
output
left
input
link out
balanced
input
balanced
input
input
link out
fuse
NO USER SERVICEABLE PARTS INSIDE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING
THIS EQUIPMENT
MUST BE EARTHED
!
P1
High Performance
Dual Mono
Stereo Power Amplifier
Designed and manufactured by
Acoustic Transducer Company
Gloucestershire
GL6 8HR
England
power
I
O
RETURN TO MANUFACTURER
FOR DISPOSAL
serial no.
CHECK VOLTAGE BEFORE USE
230V :T3.15AH 250V
115V :T6.3AH 250V
MAINS INPUT
50/60Hz
POWER CONSUMPTION
600W MAX
voltage
can only be safely used lower than 2,000 metres altitude
2000m
can only be safely used in non-tropical weather
2
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3
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2:
3:
2
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3
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Apparaten skall anslutas till jordat uttag
Apparatet må tilkoples jordet stikkontakt
Laite on liitettävä suojakoskettimilla varustettuun pistorasiaan
Acoustic Transducer Co. is a trading name
and
is the registered Trade Mark of
Loudspeaker Technology Ltd.
i.r disable
I
O
